Diamond with specially faceted pavilion



Nov. 22, 1966 J. HUISMAN ETAL DIAMOND WITH SPECIALLY FACETED PAVILIONFiled Jan. 10, 1964 FIG 4 lNlfENTO/FS. James Hulsmon 8\ Harry HuismcnATTORNEY.

United States Patent "ice 3,286,486 DIAMOND WITH SPECIALLY FACETEDPAVILIDN James Huisrnan and Harry Heisman, Westchester County, N .Y.(both of 630 5th Ave, New York, N.Y.) Filed Jan. 10, 1964, Ser. No.337,065 6 Claims. (Cl. 6332) This invention relates to a new andimproved faceted diamond construction and particularly, a brilliantdiamond construction.

The term brilliant as hereinabove and hereinafter used is a term of art,designating a brilliant cut as illustratedfor example, in GoldsteinPatent No. 2,340,659 issued on February 1, 1944 and such design patentsas D. 49,305' issued to Samuel Heller on July 4, 1916 and D. 40,693issued to Ernest G. H. Schenck on May 17, 1910.

The present invention relates principally to the lower portion of thestone, commonly known as its pavilion, that is, the portion below itsouter peripheral edge, known in the trade as the girdle. The upperportion of the stone, known as the crown and table, may be ofconventional design. The girdle itself may either be plain or facetedand parallel or non-parallel with respect to the vertical orlongitudinal axis of the stone. In short, both the girdle and the upperportion of the stone may be of any conventional design and their onlybearing upon the present invention resides in the fact that theirbrilliance and life are enhanced by the present improvement in thedesign and structure of the pavilion.

In conventional brilliant designs there are twenty-four facets in thepavilion, cut and polished at an angle of approximately 41 degrees withrespect to the plane of the girdle. It will be understoodthat thevertical or longitudinal axis of the stone is perpendicular to thegirdle plane and consequently, these twenty-four facets are disposed atan angle of approximately 49'degrees with respect to the vertical. Asstated and shown in the Gold stein patent above mentioned, the pavilionnormally has conventional twenty-four facets.

The principal object of this invention is the provision of a new andimproved diamond cut in which the pavilion is formed of seventy-twofacets.

More specifically, and this will be discussed in greater detail in thedescription to follow, the seventy-two facets herein provided consist ofeight kite facets of one shape, sixteen kite facets of another shape,sixteen star facets which are actually of diamond shape, and thirty-twofacets of triangular shape. Kite shaped and triangular shaped facets arecommonly used in the pavilion of a brilliant as illustrated in theGoldstein patent above mentioned. However, in the present constructiontwo differently shaped kite designs are employed as well as a star ordiamond shaped design. This is not conventional and certainly not in thenumbers of facets herein provided.

Among the advantages of the present construction are the following:

(1) A new ornamental appearance is provided by reason of the fact that agreater number of facets (seventytwo instead of the conventionaltwenty-four) are used and at least some of these facets are cut atdifferent angles from those commonly used. A more flowing design isthereby achieved.

(2) Enhanced life or brilliance results from the present constructionand particularly from the combination of the greatly increased number offacets in the pavilion and the different angles at which a great many ofthem are cut. The total number of facets in the present stone, assuminga conventional design in the crown and table, is 106; the total for aconventional stone is 5 8.

3,286,486 Patented Nov. 22, 1966 (3) The present construction providesfor increased resistance to chipping. Fewer facets necessarily arejoined by sharper or more acute corners or ridges; a larger numberoffacets necessarily are joined by corners or ridges which are moreobtuse. Obviously, the relatively acute corners are more prone tochipping than those which are relatively, obtuse.

The invention is illustrated in the accompanying drawing in which:

FIGURE 1 is a bottom view ofa diamond shaped in accordance with thepresent invention.

FIGURE 2 is a side view thereof looking in the direction of arrows 22of'FlGURE 1.

FIGURE 3 is atop plane view ofsaid diamond looking in the direction ofarrows 3-3 of FIGURE 2.

FIGURE 4 is a schematic view showing the angles of the facets in thepresent invention.

Referring now to the details of the present'invention as illustrated inthe drawing, it will be observed that a diamond 10, of pavilion cut ordesign, is provided with a conventional'crown 12 surmounted by aconventional table 14. Encircling the lower edge of the crown is aconventional girdle 16'. The drawing shows. the girdle to be unfacetedbut this is purely illustrative and. it will be understood that afaceted girdle, such as is shown in the above mentioned Goldsteinpatent, may also be used' in conjunction with the present invention. Theparticular design or cut of the crown and table, as illustrated inFIGURES 2 and 3, is intended to be purelyvconventional and it will beappreciated that various conventional designs for these portions of thestone may be employed in connection with the present invention.

Turning now to the pavilion 18 of stone 10 and particularly to FIGURES1, 2 and 4 of the drawing, it will be observed that the said pavilioncomprises. the following cut and polished facets: Eight kite-shapedfacets. 20 meeting at a culet 22, sixteen kite-shaped facets 24, sixteenstar or'diamond shaped facets 26 and thirty-two triangular facets 28. Itwill be observed that kite-shaped facets 20 differ both in shape andorientation from kiteshaped facets 24. In kite-shaped facets 20 thewider end, terminating at a relatively more obtuse angle, pointsdownwardly while in kite-shaped facets 24 the narrower, more acute end,points downwardly. In short, the orientation of kite-shaped facets 24 isreversed a full degrees from the orientation of kite-shaped facets 20.It will be noted that there are twice as many kite-shaped facets 24 asthere are kite-shaped facets 20, there being two facets 24 between eachpair of facets 20.

FIGURE 1 clearly shows that the shorter sides of kiteshaped facets 20,which define the more obtuse angle and form the lower end thereof,adjoin each other. The longer sides of said kite-shaped facets 20 whichmeet at a more acute angle and form the upper ends of said kiteshapedfacets 20, adjoin the longer sides of kite-shaped facets 24 which meetat a more acute angle and form the lower ends of said facets 24.

Adjoining the shorter sides of kite-shaped facets 24, which sides meetat a more obtuse angle and form the upper ends of said kite-shapedfacets are the diamond or star-shaped facets 26. Adjoining the oppositesides of said diamond or star-shaped facets 26 are the triangular facets28. The opposite sides, actually the bases of said triangular facets 28,adjoin girdle 16. The angles at which facets 20, 24, 26 and 28 areformed with respect to the horizontal, that is, the plane of the girdlewhen the longitudinal axis of the stone is vertical, are as follows:

Kite-shaped facets 2041 degrees Kite-shaped facets 2445 to 47 degrees 3Diamond-shaped facets 26-53 to 54 degrees Triangular facets 28-5 8 to 60degrees In the foregoing list of angles it is understood that thehorizontal, meaning the plane of the girdle, is situated at zero degreesand the longitudinal or vertical axis is situated at 90 degrees. Theculet 22 would also be oriented at zero degrees, that is, in ahorizontal plane parallel to the plane of the girdle.

The foregoing is illustrative of a preferred form of this invention. Itwill of course, be understood that minor modifications thereof, such asslight variations in the angles above listed, would be encompassedwithin the broad principles of the invention. Furthermore, although theinvention has above been described in connection with a diamond, it willbe appreciated that it may equally as well be applied to other preciousstones.

What is claimed is:

1. A brilliant-cut precious stone having a faceted crown and a facetedpavilion with a girdle interposed between the crown and pavilion, saidpavilion having seventy-two facets formed thereon, wherein theseventy-two facets consist of the following: thirty-two triangularfacets adjoining the girdle; sixteen diamond-shaped facets adjoiningsaid thirty-two triangular facets; sixteen kite-shaped facets adjoiningsaid diamond-shaped facets; and eight additional kite-shaped facetsadjoining said first mentioned kite-shaped facets.

2. A brilliant-cut precious stone in accordance with clainrl, whereinthe triangular facets are situated at an angle of approximately 58degrees to 60 degrees with respect to the plane of the girdle, thelongitudinal axis of the stone being perpendicular to said plane.

3. A brilliant-cut precious stone in accordance with claim 1, whereinthe diamond-shaped facets are situated at an angle of approximately 3degrees to 54 degrees with respect to the plane of the girdle, thelongitudinal axis of the stone being perpendicular to said plane.

4. A brilliant-cut precious stone in accordance with claim 1, whereinthe first mentioned kite-shaped facets are situated at an angle ofapproximately 45 degrees to 47 degrees with respect to the plane of thegirdle, the longitudinal axis of the stone being perpendicular to saidplane.

5. A brilliant-cut precious stone in accordance with claim 1, whereinthe additional kite-shaped facets are situated at an angle ofapproximately 41 degrees with respect to the plane of the girdle, thelongitudinal axis of the stone being perpendicular to said plane.

6. A brilliant-cut precious stone having a faceted crown and a facetedpavilion with a girdle interposed between the crown and pavilion, saidpavilion having seventy-two facets formed thereon, wherein the pavilionconsists of thirty-two triangular facets adjoining the girdle, andsituated at an angle of approximately 58 degrees to 60 degrees withrespect to the plane of the girdle, the longitudinal axis of said stonebeing perpendicular to said plane; sixteen diamond-shaped facetsadjoining said triangular facets and being situated at an angle ofapproximately 53 degrees to 54 degrees with respect to the plane of thegirdle; sixteen kite-shaped facets adjoining said diamond-shaped facetsand situated at an angle of approximately degrees to 47 degrees withrespect to said plane of the girdle; and eight additional kite-shapedfacets adjoining said first mentioned kite-shaped facets and situated atan angle of approximately 41 degrees with respect to said plane of thegirdle, said additional kiteshaped facets meeting at a culet which ispositioned on the longitudinal axis of the stone in a plane parallel tothe plane of the girdle.

References Cited by the Examiner UNITED STATES PATENTS D. 35,938 6/1902Schenck 63-32 X 2,340,659 2/ 1944 Goldstein 63-32 FOREIGN PATENTS324,092 12/1902 France.

RICHARD C. PINKHAM, Primary Examiner.

F. BARRY SHAY, Examiner.

1. A BRILLIANT-CUT PRECIOUS STONE HAVING A FACETED CROWN AND A FACETEDPAVILION WITH A GUIDE INTERPOSED BETWEEN THE CROWN AND PAVILION, SAIDPAVILION HAVING SEVENTY-TWO FACETS FORMED THEREON, WHEREIN THESEVENTY-TWO FACETS CONSISTS OF THE FOLLOWING; THIRTY-TWO TRIANGULARFACETS ADJOINING THE GIRDLE; SIXTEEN DIAMOND-SHAPED FACETS ADJOININGSAID THIRTY-TWO TRIANGULAR FACETS; SIXTEEN KITE-SHAPED FACETS ADJOININGSAID DIAMOND-SHAPED FACETS; AND EIGHT ADDITIONAL KITE-SHAPED FACETSADJOINING SAID FIRST MENTIONED KITE-SHAPED FACETS.